Hello.
I bought me a MDR -401x for the Intelligent Mode on my MT32, but there is no sound.
The MT32 does work on a Soundblaster.
I asked my seller on ebay about the DIP Switches on the MDR-401.
You can only set four different IRQs as written under the switches: 2-3-5-7.
The Adress is 330h and cannot be changed.

What I already tried to get music:
I removed the SB, still no sound.
I measured my midi cable with success,
used the Demosequencer Software which worked and Dos Games for testing,
changed the IRQ to 5 for testing and
changed the default receive channels from2-9 to 1-8 whlie holding down Master Volume and pressing Part 5, then Part 1.
Still no sound, no changes on the Display.
What else can I do?
Is a broken Adapter (for the MDR-401) the last possible explanation?
Is it possible that the MT32 does not work in intelligent Mode?
Greetings
Ralf